What is Floor Space Index? FSI is the ratio of a building’s total permissible construction area to the size of its plot. Knowing How is FSI Calculated helps plan building capacity. The Importance of Floor Space Index lies in regulating density and urban growth. Key Factors Impacting FSI include location, road width, zoning rules, and government policies. https://themidtown.in/floor-space-index-fsi-meaning-calculation-and-importance-explained-by-midtown